i look at timing a lot. some of the more obv ones have already been said like quick call marginal hand. also in general an insta pot like on the river is generally a bluff. and timing down is usually value. i kind of think that regs see insta action from other regs as weaker and timing down as strong and fish see ista action as strong and timing down weak. all of that is really general though and can be different with everyone.